Protomonaxonida is an extinct order of sea sponges. It is a

paraphyletic Paraphyly is a taxonomic term describing a grouping that consists of the grouping's last common ancestor and some but not all of its descendant lineages. The grouping is said to be paraphyletic ''with respect to'' the excluded subgroups. In co ...

group gathering the most ancient species from the

Burgess Shale The Burgess Shale is a fossil-bearing deposit exposed in the Canadian Rockies of British Columbia, Canada. It is famous for the exceptional preservation of the soft parts of its fossils. At old (middle Cambrian), it is one of the earliest fos ...

to modern sponges.

Families and genera

* Family † Choiidae Laubenfels, 1925 ** Genus †'' Allantospongia'' Rigby & Hou, 1995 ** Genus †'' Choia'' Walcott, 1920 ** Genus †'' Choiaella'' Rigby & Hou, 1995 ** Genus †'' Lenica'' Goryanskiy, 1977 * Family † Halichondritidae Rigby, 1986 ** Genus †'' Halichondrites'' Walcott, 1920 ** Genus †'' Pohlispongia'' Rigby & von Bitter, 2005 * Family † Hamptoniidae De Laubenfels, 1955 ** Genus †'' Hamptonia'' Walcott, 1920 ** Genus †'' Hamptoniella'' Rigby & Collins, 2004 * Family † Hazeliidae De Laubenfels, 1955 ** Genus †'' Crumillospongia'' Rigby, 1986 ** Genus †'' Falospongia'' Rigby, 1986 ** Genus †'' Hazelia'' Walcott, 1920 * Family † Leptomitidae De Laubenfels, 1955 ** Genus †'' Leptomitus'' Walcott, 1886 ** Genus †'' Paraleptomitella'' Chen et al., 1989 ** Genus †'' Pseudoleptomitus'' Botting et al., 2019 ** Genus †'' Wareiella'' Rigby & Harris, 1979 * Genus †'' Lobatospongia'' Rigby et al., 2007 * Family † Piraniidae De Laubenfels, 1955 ** Genus †'' Moleculospina'' Rigby, 1986 ** Genus †'' Pirania'' Walcott, 1920 * Family † Takakkawiidae De Laubenfels, 1955 ** Genus †'' Takakkawia'' Walcott, 1920 * Family † Ulospongiellidae Rigby & Collins, 2004 ** Genus †'' Hapalospongia'' Rigby & Collins, 2004 ** Genus †'' Ulospongiella'' Rigby & Collins, 2004 * Family † Wapkiidae De Laubenfels, 1955 ** Genus †'' Wapkia'' Walcott, 1920 The following families from the order

Hadromerida Heteroscleromorpha is a Subclass (biology), subclass of demosponges within the phylum Sponge, Porifera. Heteroscleromorpha has the most taxa of the demosponge subclasses, with an estimated 7500 species. References

Heteroscleromorpha, ...

are also sometimes placed in Protomonaxonida: * Family Sollasellidae von Lendenfeld, 1887 ** Genus †'' Luterospongia'' Rigby et al., 2008 ** Genus †'' Mckittrickella'' Rigby et al., 2007 ** Genus †'' Monaxoradiata'' Rigby & Bell, 2006 ** Genus †'' Opetionella'' Zittel, 1878 ** Genus †'' Rhizopsis'' Schrammen, 1910 ** Genus †'' Stramentella'' Gerasimov, 1960 ** Genus †'' Trichospongiella'' Rigby, 1971 * Family Tethyidae Gray, 1867 ** Genus '' Tethya'' Lamarck, 1814

References

External links

*
Protomonaxonida
at fossilworks Sponge orders {{demosponge-stub